LONG LASTING LIFETIME: MR11 halogen bulb 35w is made of updated tungsten wire, provides full level of brightness 1750lm immediately without waiting time for warming up, over 2000 hours lifespan, saving you the cost of frequent bulb replacement. EXCELLENT LIGHTING OUTPUT: DUMILOO MR11 light bulbs No-flickering that can't cause fatigue. Warm white 2700k, narrow 36 degree beam angle, CRI 99, present object color vividly and clearly, and take good care of your and your family's eyes. STANDARD SIZE: Glass Body with Glass Cover. Diameter: 1.38? (3.5cm), Length: 1.38? (3.5cm), Shape: MR 11 Reflector, Base: GU4 bi pin (4mm or 0.16? between the 2 pins). In addition, this MR16 12v 35w bulb fits most dimmers on the market, dimmable! WIDE APPLICATIONS: Fits any MR11 standard socket for quick and easy installation. Often used for landscape lighting, accent, ceiling, track lighting, fiber optics christmas tree bulb replacement, indoor spot and outdoor flood light.